|T]
Cutter
mechanism
(II)
I
Cutter
drop
prevention
mechanism
during
thread
breakage
I. Whenthe needlethread breaks, the thread breakage perceivingleverO automaticallycomesdown,and theend
ofthecutter
clutch
stopper
O
fixed
to the
thread
breakage
perceiving
lever
shaft
O
catches
onthepinofthe
clutch O and stops the cutter from falling.
Stop
cam
tab
A
Thread
take-up
lever
link
Lever
II
Cutter
drop
prevention
mechanism
during
high-speed
operation
1. When the clutch lever rises, the cutter stop connection rod 0 is pushed in the direction of the arrow, and the
movement is transmitted to the cutter stop lever O linked to its end.
2. The cutter stop lever shaft O is fixed to the cutter stop leverO and transmits the movementto the stop lever
bracket
O.
3. The clutch stop lever bracket O fixed to the stop lever bracket O ismovedin the direction of the arrow. This
holds the pin of the clutch O and locks it securely in place, thus stopping the cutter from dropping.
-7-
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